System 3505  
Network  
Multiplex  
Q-Mux  
Module  
Node  
Lightning  Protection Board  
Programmer  
DDI-9E  
Direct-Wire Inputs
 
Telegraph  
1221 Radio  
Outputs  
CGRMS  
System 4000  
System 3505C
System 4000DL
CCTV
Desplex®

The portable Q-Mux Programmer tests identification modules and reads and writes addresses.